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Vishay General Semiconductor - Diodes Division SMB10J12A-E3/5B
- Part No.:
- SMB10J12A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J12A-E3/5B.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,897
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Product details
Overview
SMB10J12A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 19.9 V clamping voltage (VC) at 50.3 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMB10J12A-E3/5B datasheet, SMB10J12A-E3/5B pinout, SMB10J12A-E3/5B application, or SMB10J12A-E3/5B equivalent, key selection criteria include clamping performance under automotive load-dump transients, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns), low incremental surge resistance, and stable clamping behavior across temperature. Its design targets transient suppression per ISO 7637-2 and IEC 61000-4-5 standards in automotive and industrial environments.
The device operates over -55 °C to +150 °C junction temperature range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Polarity is marked by a cathode band; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 12 V systems |
| VBR min/max | 13.3 V / 14.7 V at 1 mA - tight breakdown tolerance ensures predictable turn-on during transients |
| VC @ IPPM | 19.9 V at 50.3 A - clamping voltage limits downstream IC stress during 1000 W surge events |
| PPPM | 1000 W (10/1000 µs) - supports high-energy automotive load-dump and inductive switching surges |
| ID @ VWM | 5 µA max - ultra-low leakage preserves battery life in always-on automotive modules |
| TJ max | +150 °C - enables deployment in under-hood ECUs and motor control units |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Mounting pad layout: 5.59 mm × 2.18 mm minimum pad area per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground | Current path during reverse-biased clamping; must connect to lowest impedance ground plane |
| Cathode | High-side connection to protected line (e.g., 12 V rail) | Marked by color band; carries full surge current into ground during transient event |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated alternatives |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, high-temp reverse bias, and mechanical shock |
| MSL Level 1 rating | Allows single-reflow assembly without dry-pack or baking; compatible with standard SMT lines |
| Low RθJA (72 °C/W) | Supports sustained surge duty cycles without thermal runaway when mounted on recommended 5 mm × 5 mm copper pads |
| Matte tin plating | Ensures reliable solder wetting and passes JESD 201 Class 2 whisker test for long-term interconnect integrity |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIO and LIN bus transceivers from load-dump spikes (up to 35 V) during alternator regulation failure. IC Role / Device Role: Unidirectional TVS placed between 12 V supply rail and local ground plane, upstream of LDO input. Use Value: Clamps 1000 W surges to ≤19.9 V, preventing latch-up or permanent damage to 5 V logic interfaces powered from the same rail. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced transients caused by relay coil de-energization. IC Role / Device Role: Primary surge clamp on input terminal block, paired with series current-limiting resistor. Use Value: Limits transient voltage to <20 V for >50 A peak, ensuring compatibility with 24 V-rated optocoupler input stages and reducing false triggering. |
| Automotive Infotainment Power Supply | Telecom Base Station DC Feeder Line |
Use Scenario: Guards USB-C PD controller and display power management ICs against battery-reverse and jump-start transients. IC Role / Device Role: First-line protection on main 12 V input, located immediately after fuse and before bulk capacitance. Use Value: Withstands 100 A non-repetitive forward surge (IFSM), surviving repeated jump-start events without degradation. |
Use Scenario: Suppresses lightning-induced surges on -48 V telecom DC distribution lines feeding remote radio units. IC Role / Device Role: Unidirectional clamp referenced to system ground, installed at cabinet entry point. Use Value: Delivers 1000 W peak power handling with 19.9 V clamping, maintaining safe voltage margin below -48 V system's absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/5B | Same SMB package, identical VWM/VBR/VC specs, but rated for 600 W PPPM (vs. 1000 W) | Limited to lower-energy transients; not suitable for automotive load-dump per ISO 7637-2 Pulse 5a | Select SMB10J12A-E3/5B where full 1000 W surge immunity is required; SMBJ12A-E3/5B suffices for IEC 61000-4-5 Level 3 only |
| 1.5SMC12A | DO-214AB package (larger), same electrical specs, 1000 W rating, but higher RθJA (90 °C/W) | Requires larger PCB footprint and more thermal relief; less suitable for dense automotive modules | Choose SMB10J12A-E3/5B for space-constrained AEC-Q101 designs; 1.5SMC12A offers higher surge margin in non-automotive industrial layouts |
Compared with SMBJ12A-E3/5B and 1.5SMC12A, SMB10J12A-E3/5B uniquely combines AEC-Q101 qualification, 1000 W surge capability, and SMB footprint-enabling automotive-grade protection without board redesign or thermal derating penalties.
Availability
SMB10J12A-E3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power feeders requiring stable component supply, AEC-Q101 compliance, and high-power transient immunity.
Supply support for SMB10J12A-E3/5B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMB10JxxA series belongs to Vishay's TRANSZORB® high-power TVS platform, engineered specifically for AEC-Q101-compliant surge protection in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB10J12A-E3/5B at its rated peak pulse current?
The SMB10J12A-E3/5B has a maximum clamping voltage (VC) of 19.9 V at 50.3 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value ensures downstream 12 V system components remain within safe operating voltage limits during standardized surge events. The SMB10J12A-E3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB10J12A-E3/5B qualified for automotive applications?
Yes, SMB10J12A-E3/5B is AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock per automotive reliability standards. Its RoHS-compliant "E3" suffix and MSL Level 1 rating further support use in automotive ECUs, body control modules, and infotainment systems. The SMB10J12A-E3/5B is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
How does SMB10J12A-E3/5B differ from SMBJ12A-E3/5B?
SMB10J12A-E3/5B delivers 1000 W peak pulse power (PPPM) versus 600 W for SMBJ12A-E3/5B, enabling robust protection against automotive load-dump transients. Both share identical VWM (12 V), VBR (13.3–14.7 V), and VC (19.9 V), but SMB10J12A-E3/5B achieves higher energy handling via optimized chip geometry and thermal design. The SMB10J12A-E3/5B is also AEC-Q101 qualified, while SMBJ12A-E3/5B is commercial-grade only.
What is the thermal resistance of SMB10J12A-E3/5B, and how does it affect layout?
The SMB10J12A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal trace length and direct thermal connection to internal ground planes. To maintain reliability during repetitive surges, PCB layout must allocate ≥25 mm² of 2-oz copper per terminal and avoid narrow traces that increase thermal impedance. The SMB10J12A-E3/5B's low RθJA enables operation without heatsinks in most automotive and industrial applications.
Can SMB10J12A-E3/5B be used in bidirectional configurations?
No, SMB10J12A-E3/5B is a unidirectional TVS diode, indicated by its part number suffix "A" and cathode band marking. Bidirectional variants (e.g., SMB10J12CA) exist in the same family but feature symmetrical breakdown in both polarities and no polarity marking. Using SMB10J12A-E3/5B in AC or bipolar signal paths would result in forward conduction during negative half-cycles, causing failure. For bidirectional protection, select SMB10J12CA-E3/5B instead.
SMB10J12A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 50.3A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J12A-E3/5B FAQ
1.How can I place an order for SMB10J12A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J12A-E3/5B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMB10J12A-E3/5B reliable?
The price and inventory of SMB10J12A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J12A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J12A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J12A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J12A-E3/5B?
SMB10J12A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J12A-E3/5B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMB10J12A-E3/5B?
For technical support, including SMB10J12A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J12A-E3/5B requirements.
6.How does Aetrix verify that SMB10J12A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J12A-E3/5B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMB10J12A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J12A-E3/5B?
All SMB10J12A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J12A-E3/5B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMB10J12A-E3/5B part is unused and in its original packaging.
Return procedure for SMB10J12A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J12A-E3/5B Tags
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